Lock.



J. H. ROBERT SON.

'LOGK.

APPLICATION FILED JUNE 2, 1913.

Patented Oct. 14,1913;

JOHN H- K0 BERTSON t me.

Jean 11. ROBERTSON, or GRANBY, MISSOURI.

LOCK.

Application filed June 2, 1913.

To all whom it may concern Be it known that I, JOHN H. ROBERTSON, a citizen of the United States, residing at Granby, in the county of Newton and State of Missouri, have invented certain new and useful Improvements in Locks, of which the following is aspecification, reference being had to the accompanying drawings.

This invention relates to improvements in door locks, and an object thereof is to simplify and improve the construction and increase the efficiency of devices of this characterj Another object of this invention is the provision of a door lock which will be applicable to either hinged or sliding doors, and one which will securely hold the door in closed position.

With these and other objects in view, my invention consists in the novel construction, combination and arrangement of parts, to be hereinafter more fully described, claimed and illustrated in the accompanying drawing, in which Figure 1 is a side elevation of my improved lock with the cover of the casing removed; Fig. 2 is a longitudinal section thereof; Fig. 3 is a sectional view on the line 3-8 of Fig. 1, and Fig. i is a perspective view of the keeper.

Referring more particularly to the drawing, the numeral 1 designates a casing which is adapted to be secured to the inner face of a door, the casing having a latch bar 2 pivotally mounted at one end therein as at 3, the free end of the latch bar projecting beyond one end of the casing and being curved downwardly as at 4, to provide a hook for engagement with a keeper 5 which is secured to the jamb of the door. The keeper 5 comprises a base plate which is formed with a laterally extending keeper arm 6, the outer end of the arm being inclined downwardly as at 7, and the arm being provided inwardly of the inclined portion thereof with an opening 8. The arm 6 is provided to one side and forwardly of the opening 8 with an upstanding pin 9, the pin.9 being of substantially the same length as the bent portion of the latch bar, whereby when the hooked portion of the latch bar engages the inclined portion of the keeper arm, the latch bar will ride upwardly thereon so that the bar passes over the upstanding pin 9, and the hooked end a of the bar will engage in the opening 8. When the hooked portion t of the bar Specification of Letters Patent.

Patented Oct. 14,1913. Serial No. 771,268.

is engaged in the opening 8, the body portion of the bar is disposed between the base plate of the keeper and the upstanding pin 9, whereby any movement of the door is prevented.

Connected to the inner wall 10 of the easing intermediate of its ends is a guide bar 11, the intermediate portion of the guide bar being spaced from the plate 10, the opposite ends of the bar being connected to the plate. The latch bar 2 is disposed in the space between the guide bar 11 and the inner wall of the casing and the wall is provided with a key hole 12 opposite the guide bar 11, the guide bar having an opening 13 in alinement with the key hole to receive the extremity of the shank of the key 1 1. The guide bar 11 is formed below the opening 13 with a laterally extending lug 15 of any desired contour, the bit 16 of the key being provided with a notch 17 which is of the same shape as the key 15 whereby the key may be rotated so that the bit thereof may engage the latch bar and raise the hooked end 4 thereof out of engagement with the opening 8 in the keeper. Connected to the inner wall 10 of the casing near its outer end-is an offset and shouldered guide strap 18, the lower shoulder 19 of which forms a stop to limit the downward movement of the latch bar 2. The upper wall of the guide strap 18 is provided with an opening 20 through which an upstanding pin 21, formed on the latch bar, projects, and a coil spring 22 is disposed around the pin 21, one end of the spring bearing against the upper wall of the guide bar 18 and the lower end of the spring bearing against the latch bar, whereby the latch bar is forced downwardly and is held in a position to engage the inclined portion 7 of the keeper arm 6.

It is well known that lock springs often break, and that the broken parts often become wedged or jammed in between some of the working elements of the lock and prevent them from operating. Now, in case the spring 22 should be broken, the pin 21 and guide strap 18 effectually prevent dislodgment of the broken part from the guide pin 21, because of its upward extension through the apertured shoulder of the strap.

From the above description taken in con-, nectlon with the accompanying drawing, it

will be understood that my improved lock may be used either in connection with sliding or swinging doors, and that it is adapted to securely hold the door in closed position. Furthermore, the lock may be constructed for use in connection with an especially designed key, merely by changing the con formation of the laterally on theguide bar 11.

What I claim is: t In a look, a casing, a latch bar pivotally mounted in the casing and having an upstanding pin mounted thereon, an engularl-y bent and shouldered guide strap having an aperture through one of; its shoulclers and being secured to the casing in such extending lug 15 manner as to embrace the lock bat and the major portion of said pin between its shoulders and. to eeeive the upper end of said pin tlxroug aperture, anl a compression spring coiled. 'ouiod said pin and. having its lower. end semeo on the latch and its upper encl seated against the apertured shoulder.

In testimony whereof I hereunto fliilli my signature in the presence of two Witnesses. 5N0. RQBERTSUN "Witnesses:

ALVIN it. KITEEL,

d W. TAYLOR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner'oi 2mm Washingtozi, D. Q, 

